package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j

public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 向口味表和菜品表插入数据，两者相关联，@Transactional用于事务处理（回滚之类）
     * @param dishDTO
     */
    @Override
    @Transactional
    public void add(DishDTO dishDTO) {
        Dish dish=new Dish();

        BeanUtils.copyProperties(dishDTO,dish);
        dish.setStatus(StatusConstant.DISABLE);
        //菜品表
        dishMapper.insert(dish);
        //获取id值
        Long Dishid = dish.getId();
        //口味表
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(Dishid);
            });
            dishFlavorMapper.insertBach(flavors);
        }

    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<Dish> dishPage=dishMapper.page(dishPageQueryDTO);
        return new PageResult(dishPage.getTotal(),dishPage.getResult());
    }

    /**
     * 删除菜品
     * @param ids
     */
    @Override
    @Transactional
    public void delete(List<Long> ids) {
        ids.forEach(id->{
            Dish dish=dishMapper.getById(id);
            if (dish.getStatus()==StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });

        //判断当前要删除的菜品是否被套餐关联了
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            //如果关联了，抛出业务异常
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        ids.forEach(id->{
            dishMapper.deteById(id);
            dishFlavorMapper.deteById(id);
        });
    }

    /**
     * 根据id查询菜品
     * @param id
     * @return
     */
    @Override
    public DishVO getById(Long id) {
        Dish dish=dishMapper.getById(id);
        List<DishFlavor> dishFlavorList = dishFlavorMapper.getByDishId(id);

        //封装
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavorList);
        return dishVO;
    }

    /**
     * 菜品状态设置，启用/禁用
     * @param status
     * @param id
     */
    @Override
    public void startorstop(Integer status, Long id) {
        Dish dish=Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 编辑商品
     * @param dishDTO
     */
    @Override
    @Transactional
    public void update(DishDTO dishDTO) {
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.update(dish);
        //删除相关联的
        dishFlavorMapper.deteById(dishDTO.getId());

        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors != null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBach(flavors);
        }
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;

    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }
}
